Pulse current repairing device for microcrack in metal pipe and pulse current repairing method for microcrack in metal pipe

A technology of metal pipe fittings and pulse current, applied in metal processing equipment, high frequency current welding equipment, welding equipment and other directions, can solve the problems of dangerous operation, poor contact, poor repair effect of metal pipe fittings, etc., to achieve efficient repair and improve repair efficiency Effect

Inactive Publication Date: 2018-04-13
HARBIN INST OF TECH
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  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

AI Technical Summary

Problems solved by technology

[0004] The present invention aims to solve the existing method of processing metals by using pulse current. Due to the high density of pulse current, it is difficult to clamp non-slab parts, especially tubular parts, and prone to poor contact. Certainly dangerous. In addition, the existing induction heating power supply is used to repair the cracks in the metal pipe fittings, but this method has a poor repair effect on the metal pipe fittings of non-ferromagnetic materials.

Method used

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  • Pulse current repairing device for microcrack in metal pipe and pulse current repairing method for microcrack in metal pipe
  • Pulse current repairing device for microcrack in metal pipe and pulse current repairing method for microcrack in metal pipe

Examples

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Embodiment 1

[0025] figure 1 A schematic structural diagram of a pulse current repairing device for microcracks in a metal pipe in Example 1 is shown. figure 2 shown figure 1 Sectional view of A-A in the middle. The device is used for arresting and repairing micro-cracks in metal pipe fittings. The device can be used for crack arrest and repair of magnesium alloy pipe fittings, stainless steel pipe fittings, titanium alloy pipe fittings, aluminum alloy pipe fittings, etc.

[0026] refer to figure 1 and figure 2 , taking the repairing of microcracks in magnesium alloy pipe fittings as an example to illustrate this embodiment, a device for arresting and repairing microcracks in metal pipe fittings in this embodiment includes a pulse power supply 110, a helical coil 120 and a fixed shaft 130,

[0027] The magnesium alloy pipe fitting is nested and attached to the outer surface of the fixed shaft 130 , and the helical coil 120 is nested and attached to the outer surface of the magnesium...

Embodiment 2

[0042] figure 1 A schematic structural diagram of a pulse current repairing device for microcracks in a metal pipe in Example 1 is shown. figure 2 shown figure 1 Sectional view of A-A in the middle. The device is used for arresting and repairing micro-cracks in metal pipe fittings. The device can be used for crack arrest and repair of magnesium alloy pipe fittings, stainless steel pipe fittings, titanium alloy pipe fittings, carbon steel pipe fittings, aluminum alloy pipe fittings, etc.

[0043] refer to figure 1 and figure 2 , taking the repairing of microcracks in magnesium alloy pipe fittings as an example to illustrate this embodiment, this embodiment is a pulse current repair method for microcracks in metal pipe fittings, which is based on a pulse current repair method for microcracks in metal pipe fittings To fix the device implementation, the method is:

[0044] The pulse power supply 110 discharges the helical coil 120 at a discharge voltage of 1KV ~ 20KV, so t...

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Abstract

The invention provides a pulse current repairing device for microcracks in metal pipes and a pulse current repairing method for the microcracks in the metal pipes and relates to the field of microcrack arresting and repairing. The objective of the repairing device and the repairing method is to solve the problems that the non-plane type parts particularly the tube-shaped parts are difficult to beclamped, prone to bad contact and dangerous in operation to a certain extent because of a larger pulse current density in the prior method of using the pulse current for metal treatment, and moreoverthe prior method of using a sensing heating power supply for repairing the cracks in the metal pipes is bad in repairing effect of the metal pipes made of a nonferromugnetic material. A pulse power supply discharges to a spiral coil at the discharge voltage of 1-20KV and the the deformation caused by the extrusion of the spiral coil to the metal pipes is limited by using a fixing shaft for supporting the metal pipes, so that the microcracks in the metal pipes can be arrested and repaired. The device and the method are used for repairing the microcracks in the metal pipes.

Description

technical field [0001] The invention relates to a pulse current repairing device and method for microcracks in metal pipe fittings. The invention belongs to the field of crack arrest and repair of microcracks. Background technique [0002] In modern industry, metal is widely used as the main raw material in many engineering fields such as military, aviation, aerospace, shipbuilding, vehicle transportation, and machinery manufacturing. During the manufacture and use of metal components, cracks will appear due to various reasons. The expansion of cracks will cause the structural parts to break and fail before reaching the strength limit of the material, which will bring immeasurable losses to actual production and life. [0003] In the prior art, a relatively common method for crack arrest and repair is to use pulse current to treat metal. When the pulse current with high current density passes through the crack, some areas of the crack are welded, thereby repairing the part...

Claims

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Application Information

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Patent Type & Authority Applications(China)
IPC IPC(8): B23K13/01B23P6/04B23P6/00
CPCB23K13/01B23P6/00B23P6/04
Inventor 徐文臣杨川于海平单德斌
Owner HARBIN INST OF TECH
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